<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8"/>
    <title>require-js</title>
    <script src="https://cdn.bootcss.com/require.js/2.3.5/require.js" defer async="true"></script>
    <script data-main="hello" src="https://cdn.bootcss.com/require.js/2.3.5/require.js"></script>
</head>
<body>
</body>
</html>